Various examples with respect to synchronization signal block (SSB) raster shift in mobile communications are described. A processor of a user equipment (UE) performs an initial cell search to identify a cell among one or more cells of a wireless communication system. The processor then camps on the identified cell. In performing the initial cell search, the processor scans through a plurality of SSB entries for frequency bands below 3 GHz with a SSB raster spacing and a SSB raster offset frequency that support sub-carrier spacing (SCS) spaced channel raster and 100 kHz channel raster for both 15 kHz SCS and 30 kHz SCS. A minimum channel bandwidth at 5 MHz or higher for 15 kHz SCS or at 10 MHz or higher for 30 kHz SCS is supported. The SSB raster spacing is a common multiple of 15 kHz and 100 kHz. The SSB raster offset frequency for 100 kHz channel raster is a multiple of 30 kHz plus/minus 10 kHz.
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2. The method of claim 1, wherein a SSB raster spacing is 1200 kHz, and wherein a SSB raster offset frequency is 100 kHz.
3. The method of claim 1, wherein the scanning through the plurality of SSB entries comprises scanning through the plurality of SSB entries for frequency bands below 3 GHz for either or both of the SCS spaced channel raster and the 100 kHz channel raster.
4. The method of claim 1, wherein a SSB raster offset frequency for the 100 kHz channel raster is a multiple of 30 kHz plus or minus 10 kHz.
5. The method of claim 4, wherein the SSB raster offset frequency is 20 kHz, 40 kHz, 50 kHz, 70 kHz, 80 kHz or 100 kHz.
6. The method of claim 4, wherein a minimum of the SSB raster offset frequency is higher than two times of a highest frequency offset of by inaccuracy of a reference clock of the UE.
7. The method of claim 4, wherein a maximum of the SSB raster offset frequency is lower than one third of a SSB raster spacing.
8. The method of claim 1, wherein the SCS spaced channel raster comprises a SCS spaced channel raster with 15 kHz SCS.
9. The method of claim 8, wherein a minimum channel bandwidth is 5 MHz or higher.
10. The method of claim 1, wherein the SCS spaced channel raster comprises a SCS spaced channel raster with 30 kHz SCS.
11. The method of claim 10, wherein a minimum channel bandwidth is 10 MHz or higher.
12. The method of claim 1, wherein the SSB raster spacing is one of 300 kHz, 600 kHz, 900 kHz and 1200 kHz.
14. The apparatus of claim 13, wherein a SSB raster spacing is 1200 kHz, and wherein a SSB raster offset frequency is 100 kHz.
15. The apparatus of claim 13, wherein a SSB raster offset frequency for the 100 kHz channel raster is a multiple of 30 kHz plus or minus 10 kHz, and wherein a maximum of the SSB raster offset frequency is lower than one third of a SSB raster spacing.
16. The apparatus of claim 13, wherein the SCS spaced channel raster comprises a SCS spaced channel raster with 15 kHz SCS, and wherein a minimum channel bandwidth is 5 MHz or higher.
17. The apparatus of claim 13, wherein the SSB raster spacing is one of 300 kHz, 600 kHz, 900 kHz and 1200 kHz.
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November 12, 2020
December 20, 2022
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